| 摘要 |
The present invention provides an FPGA-based synchronous video switching system and method. The system comprises: an AD conversion module; a DA conversion module; a resolution detection module, configured to sample a digital video signal, and output a relevant sampling parameter; a central processing unit, configured to adjust output of the AD conversion module, and receive and transmit an external switching parameter; a CPU interface module; a first signal synchronization module, configured to perform multi-stage synchronization on multiple digital video signals; a synchronous logic switching module, configured to switch and output, according to the switching parameter, the multiple synchronized digital video signals; and a clock processing module, configured to perform frequency multiplication on an input clock signal, and output a high-speed detection clock signal to the resolution detection module. The present invention is capable of arbitrarily switching multi-video output, supporting switching of multiple resolution videos while guaranteeing the image quality, and solving the problems of reduction of the image quality, low integration level and inflexibility of a traditional switching mode. The present invention can be widely applied to the field of signal processing. |
